A high school teacher in Tennessee cracked Adobe’s secret Semaphore code. It was transmitting from Adobe Systems’ offices in San Jose for five years. The code was hidden in an art installation. It contained an audio broadcast of Neil Armstrong’s historic moon landing. The text in the code was the memorable line from the landing: “That’s one small step for man, one giant leap for mankind.”
Adobe is donating Creative Cloud software and two 3D printers to Jimmy Waters’ school in Knoxville.
The San Jose Semaphore is a 10-foot high, bisected yellow disks of LED lights. It is 70 feet wide and it’s located on the 18th floor of the Adobe Almaden Tower. The disks appear to spin every few seconds.
Source: Mercury News
Semaphore is a visual communication system similar to hand signals. Here’s more info from Wikipedia:
In computer science, a semaphore is a variable or abstract data type used to control access to a common resource by multiple processes in a concurrent system such as a multiprogramming operating system.
A trivial semaphore is a plain variable that is changed (for example, incremented or decremented, or toggled) depending on programmer-defined conditions. The variable is then used as a condition to control access to some system resource.